Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity

doi:10.1016/j.ast.2022.107779

IMECH-IR > 流固耦合系统力学重点实验室

	Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity
	Lu WS(陆维爽)1,2,3,4; Liu, Peiqing 1,2,3; Guo, Hao 1,2,3
通讯作者	Guo, Hao(guohao@buaa.edu.cn)
发表期刊	AEROSPACE SCIENCE AND TECHNOLOGY
	2022-09-01
卷号	128 页码:9
ISSN	1270-9638
摘要	With the aim of investigating noise characteristics of tonal noise generated from a Krueger storage cavity, aero-acoustic experiments on a two-dimensional, Krueger flap configuration with an open or closed gap were conducted in the D5 aero-acoustic wind tunnel at Beihang University. The angles of attack are from 4 degrees to 8 degrees, and the free-stream velocities are from 45 m/s to 60 m/s. To study further the noise temporal characteristics and generation mechanism, experimental results were analyzed using a band-pass filtering method. The results show that low-frequency noise generated by the Krueger storage flow is dominant when the Krueger flap is deployed without a gap. For the Krueger configuration with a closed gap, low -frequency multiple tones observed at a free-stream velocity above 45 m/s are generated by self-excited oscillation within the storage cavity. The frequencies corresponding to these tonal noises have an octave relationship and satisfy the Strouhal number related scaling law. Filtering results reveal further that these low-frequency tones are intermittently and alternately excited in time and satisfy the oscillation mode switching mechanism.(c) 2022 Elsevier Masson SAS. All rights reserved.
关键词	Krueger flap Storage cavity Aero-acoustic Noise characteristics Band-pass filtering
DOI	10.1016/j.ast.2022.107779
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000879854200001
关键词[WOS]	SELF-EXCITED OSCILLATION ; EDGE SLAT COVE ; UNSTEADY-FLOW ; TONES ; IMPINGEMENT ; LAYER
WOS研究方向	Engineering
WOS类目	Engineering, Aerospace
资助项目	National Natural Science Foun-dation of China ; [12072016] ; [1217021666] ; [11772033] ; [11721202]
项目资助者	National Natural Science Foun-dation of China
论文分区	一类
力学所作者排名	1
RpAuthor	Guo, Hao
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90766
专题	流固耦合系统力学重点实验室
作者单位	1.Beihang Univ, Key Lab Aeroacoust, Minist Ind & Informat Technol, Beijing 100191, Peoples R China; 2.Beihang Univ, Key Lab Fluid Mech, Minist Educ, Beijing 100191, Peoples R China; 3.Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lu WS,Liu, Peiqing,Guo, Hao. Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2022,128:9.
APA	陆维爽,Liu, Peiqing,&Guo, Hao.(2022).Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity.AEROSPACE SCIENCE AND TECHNOLOGY,128,9.
MLA	陆维爽,et al."Band-pass filtering analysis on low-frequency tonal noise generated from a Krueger storage cavity".AEROSPACE SCIENCE AND TECHNOLOGY 128(2022):9.

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